vid_vesa.h

// Emacs style mode select   -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright (C) 1998-2000 by DooM Legacy Team.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//-----------------------------------------------------------------------------
/// \file
/// \brief VESA extra modes.

#include "../doomdef.h"
#include "../screen.h"



#define MODE_SUPPORTED_IN_HW    0x0001
#define COLOR_MODE              0x0008
#define GRAPHICS_MODE           0x0010
#define VGA_INCOMPATIBLE        0x0020
#define LINEAR_FRAME_BUFFER     0x0080
#define LINEAR_MODE             0x4000

#define MAX_VESA_MODES          30  // we'll just take the first 30 if there


// VESA information block structure
typedef struct vbeinfoblock_s
{
	UINT8          VESASignature[4];
	UINT16         VESAVersion;
	unsigned long  OemStringPtr;
	UINT8          Capabilities[4];
	unsigned long  VideoModePtr;
	UINT16         TotalMemory;
	UINT8          OemSoftwareRev[2];
	UINT8          OemVendorNamePtr[4];
	UINT8          OemProductNamePtr[4];
	UINT8          OemProductRevPtr[4];
	UINT8          Reserved[222];
	UINT8          OemData[256];
}  ATTRPACK vbeinfoblock_t;


// VESA information for a specific mode
typedef struct vesamodeinfo_s
{
	UINT16         ModeAttributes;
	UINT8          WinAAttributes;
	UINT8          WinBAttributes;
	UINT16         WinGranularity;
	UINT16         WinSize;
	UINT16         WinASegment;
	UINT16         WinBSegment;
	unsigned long  WinFuncPtr;
	UINT16         BytesPerScanLine;
	UINT16         XResolution;
	UINT16         YResolution;
	UINT8          XCharSize;
	UINT8          YCharSize;
	UINT8          NumberOfPlanes;
	UINT8          BitsPerPixel;
	UINT8          NumberOfBanks;
	UINT8          MemoryModel;
	UINT8          BankSize;
	UINT8          NumberOfImagePages;
	UINT8          Reserved_page;
	UINT8          RedMaskSize;
	UINT8          RedMaskPos;
	UINT8          GreenMaskSize;
	UINT8          GreenMaskPos;
	UINT8          BlueMaskSize;
	UINT8          BlueMaskPos;
	UINT8          ReservedMaskSize;
	UINT8          ReservedMaskPos;
	UINT8          DirectColorModeInfo;

	/* VBE 2.0 extensions */
	unsigned long  PhysBasePtr;
	unsigned long  OffScreenMemOffset;
	UINT16         OffScreenMemSize;

	/* VBE 3.0 extensions */
	UINT16         LinBytesPerScanLine;
	UINT8          BnkNumberOfPages;
	UINT8          LinNumberOfPages;
	UINT8          LinRedMaskSize;
	UINT8          LinRedFieldPos;
	UINT8          LinGreenMaskSize;
	UINT8          LinGreenFieldPos;
	UINT8          LinBlueMaskSize;
	UINT8          LinBlueFieldPos;
	UINT8          LinRsvdMaskSize;
	UINT8          LinRsvdFieldPos;
	unsigned long  MaxPixelClock;

	UINT8          Reserved[190];
} ATTRPACK vesamodeinfo_t;


// setup standard VGA + VESA modes list, activate the default video mode.
void VID_Init (void);